Question

11. The addition of oxygen to a substance is called
12. When calcium carbonate is heated, it decomposes to give
and​

Answer 1

11.The addition of oxygen to a substance is called oxidation.

12. When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide.

Answer 2

AnswEr:-

Your Answers Are:-

• 11. Oxidation.

• 12. Calcium Oxide and Carbon Dioxide.

Reaction Involved in (12):-

$\bf \bullet \boxed{\bf CaCo_3 \: \xrightarrow{ \quad\triangle \quad} \: CaO + Co_2.}$

(Here triangle refers to heat).

More Related Information:-

• Oxidation:- It is the process in which oxygen is added or hydrogen is removed from a substance or you can say element.

Example:-

$\bf \bull \boxed{ \bf C + O_2 \: \: \longrightarrow \: \: Co_2.}$

Here Oxygen is added to $\tt Co_2$, hence it is a type of oxidation reaction.

• Reduction:- It is the opposite of oxidation. In reduction oxygen is removed or hydrogen is added to any substance or element.

Example:-

$\bf \bull \boxed{ \bf Co_2 \xrightarrow{ \quad \triangle \quad}C + O_2.}$

Here oxygen is removed from $\tt Co_2$ hence it is a type of reduction reaction.